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furnace/src/engine/platform/vb.cpp
tildearrow 7fd808fd31 Virtual Boy: more clean-up
2022-10-09 17:24:39 -05:00

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/**
* Furnace Tracker - multi-system chiptune tracker
* Copyright (C) 2021-2022 tildearrow and contributors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "vb.h"
#include "../engine.h"
#include <math.h>
//#define rWrite(a,v) pendingWrites[a]=v;
#define rWrite(a,v) if (!skipRegisterWrites) {writes.emplace(a,v); if (dumpWrites) {addWrite(a,v);} }
#define chWrite(c,a,v) rWrite(0x400+((c)<<6)+((a)<<2),v);
#define CHIP_DIVIDER 16
const char* regCheatSheetVB[]={
"Wave0", "000",
"Wave1", "080",
"Wave2", "100",
"Wave3", "180",
"Wave4", "200",
"ModTable", "280",
"S1INT", "400",
"S1LRV", "404",
"S1FQL", "408",
"S1FQH", "40C",
"S1EV0", "410",
"S1EV1", "414",
"S1RAM", "418",
"S2INT", "440",
"S2LRV", "444",
"S2FQL", "448",
"S2FQH", "44C",
"S2EV0", "450",
"S2EV1", "454",
"S2RAM", "458",
"S3INT", "480",
"S3LRV", "484",
"S3FQL", "488",
"S3FQH", "48C",
"S3EV0", "480",
"S3EV1", "484",
"S3RAM", "488",
"S4INT", "4C0",
"S4LRV", "4C4",
"S4FQL", "4C8",
"S4FQH", "4CC",
"S4EV0", "4C0",
"S4EV1", "4C4",
"S4RAM", "4C8",
"S5INT", "500",
"S5LRV", "504",
"S5FQL", "508",
"S5FQH", "50C",
"S5EV0", "510",
"S5EV1", "514",
"S5RAM", "518",
"S5SWP", "51C",
"S6INT", "540",
"S6LRV", "544",
"S6FQL", "548",
"S6FQH", "54C",
"S6EV0", "550",
"S6EV1", "554",
"S6RAM", "558",
NULL
};
const char** DivPlatformVB::getRegisterSheet() {
return regCheatSheetVB;
}
void DivPlatformVB::acquire(short* bufL, short* bufR, size_t start, size_t len) {
for (size_t h=start; h<start+len; h++) {
cycles=0;
while (!writes.empty()) {
QueuedWrite w=writes.front();
vb->Write(cycles,w.addr,w.val);
regPool[w.addr>>2]=w.val;
writes.pop();
}
vb->EndFrame(16);
tempL=0;
tempR=0;
for (int i=0; i<6; i++) {
oscBuf[i]->data[oscBuf[i]->needle++]=(vb->last_output[i][0]+vb->last_output[i][1])*8;
tempL+=vb->last_output[i][0];
tempR+=vb->last_output[i][1];
}
if (tempL<-32768) tempL=-32768;
if (tempL>32767) tempL=32767;
if (tempR<-32768) tempR=-32768;
if (tempR>32767) tempR=32767;
bufL[h]=tempL;
bufR[h]=tempR;
}
}
void DivPlatformVB::updateWave(int ch) {
if (ch>=5) return;
for (int i=0; i<32; i++) {
rWrite((ch<<7)+(i<<2),chan[ch].ws.output[i]);
}
}
void DivPlatformVB::tick(bool sysTick) {
for (int i=0; i<6; i++) {
chan[i].std.next();
if (chan[i].std.vol.had) {
chan[i].outVol=VOL_SCALE_LINEAR(chan[i].vol&15,MIN(15,chan[i].std.vol.val),15);
chWrite(i,0x04,chan[i].outVol<<4);
}
if (chan[i].std.arp.had) {
if (!chan[i].inPorta) {
chan[i].baseFreq=NOTE_PERIODIC(parent->calcArp(chan[i].note,chan[i].std.arp.val));
}
chan[i].freqChanged=true;
}
if (chan[i].std.wave.had) {
if (chan[i].wave!=chan[i].std.wave.val || chan[i].ws.activeChanged()) {
chan[i].wave=chan[i].std.wave.val;
chan[i].ws.changeWave1(chan[i].wave);
if (!chan[i].keyOff) chan[i].keyOn=true;
}
}
if (chan[i].std.panL.had) {
chan[i].pan&=0x0f;
chan[i].pan|=(chan[i].std.panL.val&15)<<4;
}
if (chan[i].std.panR.had) {
chan[i].pan&=0xf0;
chan[i].pan|=chan[i].std.panR.val&15;
}
if (chan[i].std.panL.had || chan[i].std.panR.had) {
chWrite(i,0x01,isMuted[i]?0:chan[i].pan);
}
if (chan[i].std.pitch.had) {
if (chan[i].std.pitch.mode) {
chan[i].pitch2+=chan[i].std.pitch.val;
CLAMP_VAR(chan[i].pitch2,-32768,32767);
} else {
chan[i].pitch2=chan[i].std.pitch.val;
}
chan[i].freqChanged=true;
}
if (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1) {
// ???
}
if (chan[i].active) {
if (chan[i].ws.tick() || (chan[i].std.phaseReset.had && chan[i].std.phaseReset.val==1)) {
updateWave(i);
}
}
if (chan[i].freqChanged || chan[i].keyOn || chan[i].keyOff) {
chan[i].freq=parent->calcFreq(chan[i].baseFreq,chan[i].pitch,true,0,chan[i].pitch2,chipClock,CHIP_DIVIDER);
if (chan[i].freq<1) chan[i].freq=1;
if (chan[i].freq>2047) chan[i].freq=2047;
chan[i].freq=2048-chan[i].freq;
chWrite(i,0x02,chan[i].freq&0xff);
chWrite(i,0x03,chan[i].freq>>8);
if (chan[i].keyOn) {
}
if (chan[i].keyOff) {
chWrite(i,0x04,0);
}
if (chan[i].keyOn) chan[i].keyOn=false;
if (chan[i].keyOff) chan[i].keyOff=false;
chan[i].freqChanged=false;
}
}
}
int DivPlatformVB::dispatch(DivCommand c) {
switch (c.cmd) {
case DIV_CMD_NOTE_ON: {
DivInstrument* ins=parent->getIns(chan[c.chan].ins,DIV_INS_PCE);
if (c.value!=DIV_NOTE_NULL) {
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value);
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
}
chan[c.chan].active=true;
chan[c.chan].keyOn=true;
chan[c.chan].macroInit(ins);
if (!parent->song.brokenOutVol && !chan[c.chan].std.vol.will) {
chan[c.chan].outVol=chan[c.chan].vol;
chWrite(c.chan,0x04,chan[c.chan].outVol<<4);
}
if (chan[c.chan].wave<0) {
chan[c.chan].wave=0;
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
}
chan[c.chan].ws.init(ins,32,63,chan[c.chan].insChanged);
chan[c.chan].insChanged=false;
break;
}
case DIV_CMD_NOTE_OFF:
chan[c.chan].active=false;
chan[c.chan].keyOff=true;
chan[c.chan].macroInit(NULL);
break;
case DIV_CMD_NOTE_OFF_ENV:
case DIV_CMD_ENV_RELEASE:
chan[c.chan].std.release();
break;
case DIV_CMD_INSTRUMENT:
if (chan[c.chan].ins!=c.value || c.value2==1) {
chan[c.chan].ins=c.value;
chan[c.chan].insChanged=true;
}
break;
case DIV_CMD_VOLUME:
if (chan[c.chan].vol!=c.value) {
chan[c.chan].vol=c.value;
if (!chan[c.chan].std.vol.has) {
chan[c.chan].outVol=c.value;
if (chan[c.chan].active) {
chWrite(c.chan,0x04,chan[c.chan].outVol<<4);
}
}
}
break;
case DIV_CMD_GET_VOLUME:
if (chan[c.chan].std.vol.has) {
return chan[c.chan].vol;
}
return chan[c.chan].outVol;
break;
case DIV_CMD_PITCH:
chan[c.chan].pitch=c.value;
chan[c.chan].freqChanged=true;
break;
case DIV_CMD_WAVE:
chan[c.chan].wave=c.value;
chan[c.chan].ws.changeWave1(chan[c.chan].wave);
chan[c.chan].keyOn=true;
break;
case DIV_CMD_PCE_LFO_MODE:
if (c.value==0) {
lfoMode=0;
} else {
lfoMode=c.value;
}
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
break;
case DIV_CMD_PCE_LFO_SPEED:
lfoSpeed=255-c.value;
rWrite(0x08,lfoSpeed);
rWrite(0x09,lfoMode);
break;
case DIV_CMD_NOTE_PORTA: {
int destFreq=NOTE_PERIODIC(c.value2);
bool return2=false;
if (destFreq>chan[c.chan].baseFreq) {
chan[c.chan].baseFreq+=c.value;
if (chan[c.chan].baseFreq>=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
} else {
chan[c.chan].baseFreq-=c.value;
if (chan[c.chan].baseFreq<=destFreq) {
chan[c.chan].baseFreq=destFreq;
return2=true;
}
}
chan[c.chan].freqChanged=true;
if (return2) {
chan[c.chan].inPorta=false;
return 2;
}
break;
}
case DIV_CMD_STD_NOISE_MODE:
chan[c.chan].noise=c.value;
chWrite(c.chan,0x07,chan[c.chan].noise?(0x80|chan[c.chan].note):0);
break;
case DIV_CMD_PANNING: {
chan[c.chan].pan=(c.value&0xf0)|(c.value2>>4);
chWrite(c.chan,0x01,isMuted[c.chan]?0:chan[c.chan].pan);
break;
}
case DIV_CMD_LEGATO:
chan[c.chan].baseFreq=NOTE_PERIODIC(c.value+((chan[c.chan].std.arp.will && !chan[c.chan].std.arp.mode)?(chan[c.chan].std.arp.val):(0)));
chan[c.chan].freqChanged=true;
chan[c.chan].note=c.value;
break;
case DIV_CMD_PRE_PORTA:
if (chan[c.chan].active && c.value2) {
if (parent->song.resetMacroOnPorta) chan[c.chan].macroInit(parent->getIns(chan[c.chan].ins,DIV_INS_PCE));
}
if (!chan[c.chan].inPorta && c.value && !parent->song.brokenPortaArp && chan[c.chan].std.arp.will) chan[c.chan].baseFreq=NOTE_PERIODIC(chan[c.chan].note);
chan[c.chan].inPorta=c.value;
break;
case DIV_CMD_GET_VOLMAX:
return 15;
break;
case DIV_ALWAYS_SET_VOLUME:
return 1;
break;
default:
break;
}
return 1;
}
void DivPlatformVB::muteChannel(int ch, bool mute) {
isMuted[ch]=mute;
chWrite(ch,0x01,isMuted[ch]?0:chan[ch].pan);
}
void DivPlatformVB::forceIns() {
for (int i=0; i<6; i++) {
chan[i].insChanged=true;
chan[i].freqChanged=true;
updateWave(i);
chWrite(i,0x01,isMuted[i]?0:chan[i].pan);
}
}
void* DivPlatformVB::getChanState(int ch) {
return &chan[ch];
}
DivMacroInt* DivPlatformVB::getChanMacroInt(int ch) {
return &chan[ch].std;
}
DivDispatchOscBuffer* DivPlatformVB::getOscBuffer(int ch) {
return oscBuf[ch];
}
unsigned char* DivPlatformVB::getRegisterPool() {
return regPool;
}
int DivPlatformVB::getRegisterPoolSize() {
return 0x180;
}
int DivPlatformVB::getRegisterPoolDepth() {
return 8;
}
void DivPlatformVB::reset() {
while (!writes.empty()) writes.pop();
memset(regPool,0,0x600);
for (int i=0; i<6; i++) {
chan[i]=DivPlatformVB::Channel();
chan[i].std.setEngine(parent);
chan[i].ws.setEngine(parent);
chan[i].ws.init(NULL,32,63,false);
}
if (dumpWrites) {
addWrite(0xffffffff,0);
}
vb->Power();
tempL=0;
tempR=0;
cycles=0;
curChan=-1;
lfoMode=0;
lfoSpeed=255;
// set per-channel initial values
for (int i=0; i<6; i++) {
chWrite(i,0x01,isMuted[i]?0:chan[i].pan);
chWrite(i,0x05,0x00);
chWrite(i,0x00,0x80);
chWrite(i,0x06,i);
}
delay=500;
}
bool DivPlatformVB::isStereo() {
return true;
}
bool DivPlatformVB::keyOffAffectsArp(int ch) {
return true;
}
float DivPlatformVB::getPostAmp() {
return 6.0f;
}
void DivPlatformVB::notifyWaveChange(int wave) {
for (int i=0; i<6; i++) {
if (chan[i].wave==wave) {
chan[i].ws.changeWave1(wave);
updateWave(i);
}
}
}
void DivPlatformVB::notifyInsDeletion(void* ins) {
for (int i=0; i<6; i++) {
chan[i].std.notifyInsDeletion((DivInstrument*)ins);
}
}
void DivPlatformVB::setFlags(const DivConfig& flags) {
chipClock=5000000.0;
rate=chipClock/16;
for (int i=0; i<6; i++) {
oscBuf[i]->rate=rate;
}
if (vb!=NULL) {
delete vb;
vb=NULL;
}
vb=new VSU;
}
void DivPlatformVB::poke(unsigned int addr, unsigned short val) {
rWrite(addr,val);
}
void DivPlatformVB::poke(std::vector<DivRegWrite>& wlist) {
for (DivRegWrite& i: wlist) rWrite(i.addr,i.val);
}
int DivPlatformVB::init(DivEngine* p, int channels, int sugRate, const DivConfig& flags) {
parent=p;
dumpWrites=false;
skipRegisterWrites=false;
for (int i=0; i<6; i++) {
isMuted[i]=false;
oscBuf[i]=new DivDispatchOscBuffer;
}
vb=NULL;
setFlags(flags);
reset();
return 6;
}
void DivPlatformVB::quit() {
for (int i=0; i<6; i++) {
delete oscBuf[i];
}
if (vb!=NULL) {
delete vb;
vb=NULL;
}
}
DivPlatformVB::~DivPlatformVB() {
}
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